Watch dial



FIG. 1 is a front view of our new, original and ornamental design for a watch dial;

FIG. 2 is a rear view thereof; and,

FIG. 3 is a side view thereof.

The broken lines shown in FIG. 1 and the area within the broken lines do not form part of the claimed design. The claimed portion of the front of the watch dial is a flat and solid surface. 

The ornamental design for a watch dial, as shown and described. 